GPencil: Z pass combine not work #78574
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Reference: blender/blender#78574
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System Information
Windows 10 64bit , NVIDIA GTX1080,i7-6700k,Ram:32GB
WIN 10 ,GPU drivers all latest version.
Blender Version
Broken: Blender 2.83.1 LTS
Worked: 2.82a
Caused by
29f3af9527Short description of error
In 2.8 version can see the Z combine is work
In 2.83.1 LTS version Z combine not work
Test_Depth.blend
Added subscriber: @YeeTaTa
Added subscribers: @fclem, @antoniov
@fclem could you take a look? not sure if this is supported or not with the new engine.
Grease pencil Z combine not workto GPencil: Z pass combine not workChanged status from 'Needs Triage' to: 'Confirmed'
Added subscriber: @lichtwerk
Since this is also related to depth, #81950 (Grease Pencil Ignores 'Stroke Placement: Stroke') is probably related
Hi!
I forgot to mention that the bug file camera is using Orthographic.
And now i find same Z pass combine not work when camera is using Perspective.
System Information
Windows 10 64bit , NVIDIA GTX1080,i7-6700k,Ram:32GB
WIN 10 ,GPU drivers all latest version.
Blender Version
Broken: Blender 2.83.9 LTS
Short description of error
In 2.83.9 LTS version Z combine not work when camera is using Perspective.
New Origin File:20201125_test.blend
Do I need to reopen one post?
Hmm......May I ask if it is possible to fix this feature in the 2.83LTS update?Or only at 2.9?
Because in the current project, I very need this can work.
Thank you guys!
Added subscriber: @JamellMoore
By sampling the depth pass from the Suzanne Gpencil object I can see that the z-depth may have been negated somewhere. The depth values are reading -0.340 rather than +0.340.
So to work around this until the bug is fixed you should be able to multiply the depth by -1.0 to get the correct result. Also ensure that you turn on transparency in your renders by going to render properties->film->transparency. I hope this works for your project file and not just the sample file.
I've uploaded a sample file, the same the one you supplied without references to images in the background.
Bug-#7857-GPencil-Z-pass-combine-work-around.blend
I've just tested the possible work around in the 20201125_test.blend and it doesn't seem to be that the z-depth is negated. Instead of multiplying by -1 you can add or subtract a certain value. I did this and rendered an animation and it seems to work.
Bug-#7857-GPencil-Z-pass-combine-work-around-test.avi
It doesn't look like the offset is changing with distance but its difficult to tell from this example. I will do another test soon to try to narrow down the issue.
Thank you, this method solved my problem, I didn't expect to be able to do this.
This issue was referenced by
d1ee8a0502Changed status from 'Confirmed' to: 'Resolved'